Duplex operation method and user device using the same

Abstract

To provide a method and an apparatus for performing duplex operation of an uplink (UL) transmission and a downlink (DL) reception in user equipment (UE).SOLUTION: A method of duplex operation used by UE, in a wireless communication system that may be more stable and efficient, includes receiving at least one indication indicating at least one of a DL reception and a UL transmission, and performing the DL reception through a first resource or the UL transmission through a second resource according to a rule.SELECTED DRAWING: Figure 6B

Description

Technical Field

[0001] The present invention relates to a duplex operation method and a user device using the same.

Background Art

[0002] The 3GPP (Third Generation Partnership Project) is developing a 5G wireless access technology known as New Radio (NR). 5G NR aims to support various usage scenarios to meet new requirements related to latency, reliability, security, scalability (such as Internet of Things (IoT)), and other requirements. 5G NR includes services related to enhanced mobile broadband (eMBB), massive machine type communication (mMTC), and ultra-reliable and low-latency communication (URLLC). However, in 5G NR technology, there is a need to further improve multi-access. These improvements may also be applicable to other multi-access technologies and telecommunications standards using these technologies. For example, conventional duplex operations are becoming unable to meet the needs of 5G NR.

[0003] Conventional duplex operation includes time-division duplexing (TDD) and frequency-division duplexing (FDD). Specifically, TDD uses the same frequency band for both data transmission and reception, but not simultaneously. In TDD, data transmission and reception occur on non-overlapping time resources, so only the transmitter or receiver is active at any given time. FDD, on the other hand, uses two separate frequency bands for data transmission and reception. In FDD, the transmit and receive frequencies are separated by a defined frequency gap, which allows for simultaneous transmission and reception without interference. While TDD is more flexible, allocating a limited time to uplink (UL) in TDD reduces coverage and increases latency. In other words, TDD may require higher latency, especially for UL, because the wireless device must wait for the UL resource to transmit the UL transmission. Furthermore, both TDD and FDD waste significant spectral resources. Therefore, it is worth considering the feasibility of enabling the simultaneous existence of downlink (DL) transmission and UL transmission (also known as full duplex).

[0004] Therefore, 5GNR introduces subband full duplex (SBFD) to address uplink latency issues. SBFD enables simultaneous transmission and reception on the same slot using TDD carriers divided into subbands. Note that SBFD differs from conventional FDD. In conventional FDD, a given carrier and / or bandwidth portion (BWP) is typically entirely dedicated to either uplink or downlink communication. In SBFD, a portion of the time-frequency resources of a given carrier is dedicated to UL, and a portion of the same carrier's time-frequency resources supports DL. However, the current 5GNR system specifications do not yet specifically address how to handle time-domain conflicts between UE UL and DL operations when applying full duplex (e.g., SBFD). However, such a specification is necessary to reduce UL latency. [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] When applying full duplex (e.g., SBFD) in future wireless communication systems, it is necessary to address the time-domain conflict between UL and DL operations of the UE. Therefore, the present invention relates to a method of duplex operation and user equipment using the same. [Means for solving the problem]

[0006] In one exemplary embodiment, the present invention relates to a method of duplex operation used by a UE, the method including, but not limited to, receiving at least one instruction indicating at least one of DL reception and UL transmission, and performing DL reception via a first resource or UL transmission via a second resource in accordance with a rule.

[0007] In one exemplary embodiment, the present invention relates to a UE comprising a transceiver and a processor coupled to the transceiver, configured to receive at least one instruction directing at least one DL reception and UL transmission, and performing DL reception via a first resource or UL transmission via a second resource in accordance with the rules, but not limited to these. [Effects of the Invention]

[0008] Based on the above, the UE can decide whether to perform DL reception via the first resource or UL transmission via the second resource when DL reception and UL transmission overlap in the time domain. Therefore, the communication system can become more stable and efficient.

[0009] However, it should be understood that this summary does not encompass all aspects and embodiments of the present invention, and therefore does not mean to limit or restrict them in any way. Furthermore, the present invention includes improvements and modifications that would be obvious to those skilled in the art. [Brief explanation of the drawing]

[0010] The accompanying drawings are included to provide a further understanding of the present invention and are incorporated herein and constitute part of this specification. The drawings illustrate embodiments of the present invention and, together with the description, help to illustrate the principles of the present invention. [Figure 1] This is a schematic diagram illustrating full-duplex communication on the BS side. [Figure 2] This is a schematic diagram showing the slot configuration. [Figure 3] This is a schematic diagram illustrating the dynamic scheduling of DL reception and UL transmission across different flexible resources. [Figure 4A] This is a schematic diagram showing the limitations on receiving flexible resources in the DL portion when DCI format 2_0 is detected. [Figure 4B] This is a schematic diagram showing the transmission limitations of flexible resources in the UL portion when DCI format 2_0 is detected. [Figure 4C] This is a schematic diagram showing transmission and reception when DCI format 2_0 is not detected. [Figure 5A] This is a schematic diagram illustrating BWP switching for DL ​​reception. [Figure 5B] This is a schematic diagram illustrating BWP switching in UL transmission. [Figure 6A] This is a schematic diagram of a wireless communication system according to one embodiment of the present invention. [Figure 6B] This is a flowchart illustrating a method for duplex operation according to one embodiment of the present invention. [Figure 7A] This is a schematic diagram illustrating UL delay reduction according to an exemplary embodiment of the present invention. [Figure 7B] This is a schematic diagram illustrating UL delay reduction according to an exemplary embodiment of the present invention. [Figure 8A] This is a schematic diagram illustrating the execution of DL reception or UL transmission without a DL configuration according to an exemplary embodiment of the present invention. [Figure 8B] This is a schematic diagram illustrating the execution of DL reception or UL transmission without a DL configuration according to an exemplary embodiment of the present invention. [Figure 9A]When DL reception according to an embodiment of the present invention is SSB reception, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 9B] When DL reception according to an embodiment of the present invention is SSB reception, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 10A] When DL reception according to an embodiment of the present invention is CORESET reception, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 10B] When DL reception according to an embodiment of the present invention is CORESET reception, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 11] When DL reception according to an embodiment of the present invention is configured by a higher layer, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 12] When DL reception according to an embodiment of the present invention is dynamic DL reception, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 13] When DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 14] When DL reception according to an embodiment of the present invention is dynamic DL reception and UL transmission is dynamic UL transmission, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 15] It is a schematic diagram of high-speed DL reception according to an exemplary embodiment of the present invention. [Figure 16A] It is a schematic diagram showing execution of DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. [Figure 16B] It is a schematic diagram showing execution of DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. [Figure 17A] When UL transmission according to an exemplary embodiment of the present invention is SR, it is a schematic diagram showing execution of DL reception or UL transmission. [Figure 17B]This is a schematic diagram showing that when UL transmission according to an exemplary embodiment of the present invention is SR, DL reception or UL transmission is performed. [Figure 18A] This is a schematic diagram illustrating that DL reception or UL transmission is performed when the UL transmission according to an exemplary embodiment of the present invention is an RA message. [Figure 18B] This is a schematic diagram illustrating that DL reception or UL transmission is performed when the UL transmission according to an exemplary embodiment of the present invention is an RA message. [Figure 19] This is a schematic diagram showing that when UL transmission according to one embodiment of the present invention is configured by a higher layer, DL reception or UL transmission is performed. [Figure 20] This is a schematic diagram showing that DL reception or UL transmission is performed when UL transmission according to an exemplary embodiment of the present invention is dynamic UL transmission. [Figure 21A] This schematic diagram shows that DL reception or UL transmission is performed when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. [Figure 21B] This schematic diagram shows that DL reception or UL transmission is performed when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. [Figure 22] This is a schematic diagram illustrating explicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. [Figure 23A] This is a schematic diagram illustrating implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. [Figure 23B] This is a schematic diagram illustrating implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. [Figure 24A] This is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. [Figure 24B] This is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. [Figure 24C]This is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. [Figure 25] This is a block diagram showing a communication device 2500 according to an exemplary embodiment of the present invention. [Modes for carrying out the invention]

[0011] It should be understood that both the general description above and the detailed description below are illustrative and intended to provide a further explanation of the claimed invention. Wherever possible, the same reference numerals are used in the drawings and description to refer to the same or similar components.

[0012] Several embodiments of wireless communication systems are presented with reference to various devices and methods. These devices and methods are described in the following detailed description and are illustrated in the accompanying drawings by various elements such as blocks, components, circuits, processes, and algorithms. These elements can be implemented using electronic hardware, computer software, or any combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and design constraints imposed on the system as a whole. Thus, in one or more exemplary embodiments, the functions described herein can be implemented in hardware, software, or any combination thereof. When implemented in software, the functions can be stored or encoded as one or more instructions or codes on a computer-readable medium.

[0013] Figure 1 is a schematic diagram illustrating full-duplex communication on the BS side. Referring to Figure 1, "D" represents downlink (DL) and "U" represents uplink (UL). If the BS supports subband non-overlapping full-duplex, some slots or symbols may be divided into at least two subbands, each responsible for DL ​​transmission and UL reception, so that the BS can perform simultaneous transmission and reception on different non-overlapping subbands at the same time. In other words, full-duplex communication can be realized in unpaired spectra where transmission occurs in different directions on subbands with different carrier bandwidths.

[0014] This is a schematic diagram showing the slot configuration. Referring to Figure 2, the slot format may include DL symbol 201, flexible symbol 202, and UL symbol 203. The following instructions are applicable to each serving cell to indicate the UE for the transmission direction in a single slot: tdd-UL-DL-ConfigurationCommon (carried by the Wireless Resource Control (RRC) message), tdd-UL-DL-ConfigurationDedicated (carried by the RRC message), and Slot Format Indicator (SFI)-Wireless Network Temporary Identifier (RNTI) (carried by the RRC message and used to receive Downlink Control Information (DCI) such as DCI format 2_0). In other words, the slot format may be indicated to the UE by the above instructions.

[0015] Figure 3 is a schematic diagram illustrating the dynamic scheduling of DL reception and UL transmission across different flexible resources. Referring to Figure 3, in response to the UE detecting a DCI format indicating that DL reception should be performed on flexible resource 301, the UE can perform DL reception (i.e., PDSCH) on flexible resource 301. Furthermore, in response to the UE detecting a DCI format indicating that UL transmission should be performed on flexible resource 302, the UE can perform UL transmission (i.e., PUSCH) on flexible resource 302. Note that if there is only one flexible resource, the UE cannot (for example, cannot expect) to perform DL signal reception and UL signal transmission simultaneously. In other words, the UE cannot perform UL transmission and DL reception simultaneously on the same flexible resource.

[0016] Figure 4A is a schematic diagram showing the reception restrictions for flexible resources in the DL portion when DCI format 2_0 is detected. Referring to Figure 4A, if the UE detects DCI format 2_0, which is composed of flexible resources and indicates flexible resources as flexible resources by the upper layer settings, DL reception on such flexible resources may be restricted as shown in Figure 4A. The UE does not have to receive the Physical Downlink Control Channel (PDCCH) on the flexible resource. If the upper layer is configured to receive the Physical Downlink Shared Channel (PDSCH) or Channel Status Information Reference Signal (CSI-RS) on the flexible resource, the UE does not have to receive the PDSCH or CSI-RS on the flexible resource. If the upper layer is configured to receive the DL Positioning Signal (PRS) on the flexible resource, the UE can receive the DLPRS on the flexible resource.

[0017] Figure 4B is a schematic diagram showing the transmission limitations of flexible resources in the UL portion when DCI format 2_0 is detected. Referring to Figure 4B, if the UE is configured with flexible resources by the upper layer configuration and detects DCI format 2_0 indicating the flexible resources as flexible resources, UL transmission on such flexible resources may be limited as shown in Figure 4B under the following conditions: If the UE is configured by the upper layer to transmit a sounding reference signal (SRS) on the flexible resource, the UE does not have to transmit the SRS on the flexible resource. If the UE is configured by the upper layer to transmit a physical uplink control channel (PUCCH) on the flexible resource, the UE does not have to transmit the PUCCH on the flexible resource. If the UE is configured by the upper layer to transmit a physical uplink shared channel (PUSCH) on the flexible resource, the UE does not have to transmit the PUSCH on the flexible resource. If the UE is configured by the upper layer to transmit a physical random access channel (PRACH) on the flexible resource, the UE does not have to transmit the PRACH on the flexible resource.

[0018] Figure 4C is a schematic diagram showing transmission and reception when DCI format 2_0 is not detected. Referring to Figure 4C, if the UE is configured with a flexible resource by the upper layer configuration, but DCI format 2_0 indicating the flexible resource as a flexible resource is not detected, UL transmission and DL reception on such a flexible resource may be under the following conditions shown in Figure 4C: The UE can receive PDCCH on the flexible resource. If the UE is configured by the upper layer to receive DL PRS on the flexible resource, the UE can receive DL PRS on the flexible resource. If the UE is configured by the upper layer to transmit SRS on the flexible resource, the UE can transmit SRS on the flexible resource. If the UE is configured by the upper layer to transmit PUCCH, the UE can transmit PUCCH on the flexible resource. If the UE is configured by the upper layer to transmit PUSCH, the UE can transmit PUSCH on the flexible resource. If the UE is configured by the upper layer to transmit PRACH on the flexible resource, the UE can transmit PRACH on the flexible resource.

[0019] In future wireless communication systems, such as 5GNR systems, bandwidth portions (BWPs) may be used to allocate bandwidth to UEs that have difficulty supporting broadband in wireless communication systems using broadband. Future wireless communication systems may support various numerologies for the same carrier (e.g., subcarrier spacing (SCS), cyclic prefix (CP) length, etc.). BWPs may include a set of consecutive physical resource blocks (PRBs) in future wireless communication systems. Furthermore, BWP switching procedures may be used to activate inactive BWPs and deactivate active BWPs simultaneously.

[0020] Figure 5A is a schematic diagram illustrating BWP switching for DL ​​reception. Referring to Figure 5A, the UE can receive DCI51, which is DCI format 0_1, on the first BWP, and DCI51 can instruct the UE to receive PDSCH53 on the second BWP. Thus, the UE can perform BWP switching from the first BWP to the second BWP in order to receive PDSCH53 on the second BWP. In some cases, after receiving PDSCH53, the UE can remain on the second BWP and transmit HARQ feedback on PUCCH54, which corresponds to PDSCH53 on the second BWP.

[0021] Figure 5B is a schematic diagram illustrating BWP switching for UL transmission. Referring to Figure 5B, the UE can receive DCI52, which is DCI format 1_1, at the first BWP, and DCI52 can instruct the UE to transmit PUSCH55 at the second BWP. Thus, the UE can perform BWP switching from the first BWP to the second BWP in order to transmit PUSCH55 at the second BWP. In some cases, after the PUSCH transmission, the UE may remain at the second BWP.

[0022] Figure 6A is a schematic diagram of a wireless communication system according to one embodiment of the present invention. Referring to Figure 6A, the wireless communication system 10 includes, but is not limited to, a UE 100 and a base station 200. In other examples, the wireless communication system 10 may be, or include, a 5G (e.g., NR) network and / or a 4G (e.g., Long-Term Evolution (LTE)) network. In some examples, the wireless communication system 10 can support advanced broadband communication, ultra-high reliability communication, low latency communication, communication with low-cost and low-complexity devices, or any combination thereof.

[0023] The base station 200 and UE 100 can communicate wirelessly via one or more communication links. The base station 200 can provide a coverage area on which the UE 100 and base station 200 can establish one or more communication links. The coverage area may be an example of a geographical area on which the base station 200 and UE 100 can support the communication of signals according to one or more wireless access technologies. The base station 200 may be a macro base station, a pico base station, or a femto base station, but is not limited to these in this invention.

[0024] The base station 200 can support the operation of a cell. Each cell may be capable of operating to serve at least one UE 100 within its wireless coverage. Specifically, each cell (often referred to as a serving cell) can provide services to one or more UE 100 within its wireless range (for example, each cell schedules to transmit downlink (DL) and optionally uplink (UL) resources to at least one UE within its wireless coverage of DL and optionally UL packet transmission). The base station 200 can communicate with one or more UE 100 in the wireless communication system via multiple cells.

[0025] The base station 200 may include, for example, an NR base station, an LTE base station, a node B, an eNB (e.g., 4G), a gNB (e.g., 5G), a node B, an advanced BS (ABS), a transmission receiving point (TRP), an unlicensed TRP, a base transceiver system (BTS), an access point, a home BS, a relay station, a scatter, a repeater, an intermediate node, an intermediate, a satellite communication BS, and the like.

[0026] The UE100 can communicate with a network (e.g., a core network (CN), an evolved packet core (EPC) network, an evolved universal terrestrial wireless access network (E-UTRAN), a 5G core (5GC), or the Internet) via a RAN established by one or more base stations 200. Wireless communication between the base stations 200 and the UE100 may be described as utilizing an air interface. Transmission from the base station 200 to the UE100 via the air interface is also called downlink (DL) transmission. Transmission from the UE100 to the base station 200 is also called uplink (UL) transmission.

[0027] UE100 may be, for example, a mobile station, an advanced mobile station (AMS), a server, a client, a desktop computer, a laptop computer, a network computer, a workstation, a personal digital assistant (PDA), a tablet personal computer (PC), a scanner, a telephone, a pager, a camera, a television, a handheld video game device, a music player, a wireless sensor, and the like. In some applications, UE may be a stationary computer device operating in a mobile environment such as a bus, train, airplane, boat, or automobile. UE100 can also be considered, for example, a machine type communication (MTC) or an evolutionary or advanced machine type communication (eMTC) UE. MTCUE and / or eMTCUE may include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags that can communicate with a base station, another device (e.g., a remote device), or other entity.

[0028] In some embodiments, a duplex scheme often called subband full-duplex (SBFD) may be used in a wireless communication system 10 utilizing orthogonal frequency division multiplexing (OFDM). In some embodiments, UE100 may remain in half-duplex operation while BS200 can operate in full-duplex (e.g., SBFD).

[0029] To facilitate understanding of the technical solutions of the embodiments of the present invention, the technical concepts related to the embodiments of the present invention are described below.

[0030] Figure 6B is a flowchart of a method for duplex operation according to one embodiment of the present invention. Referring to Figure 6B, the method of this embodiment may be adapted to the UE100 under the wireless communication system 10 of Figure 6A. However, the steps of this method can be adjusted according to the actual needs and are therefore not limited to the following.

[0031] In S610, UE100 can receive at least one instruction indicating at least one of DL reception and UL transmission. In some embodiments, DL reception and UL transmission overlap in the time domain. Specifically, BS200 can operate in subband non-overlapping full duplex (e.g., SBFD) and perform DL and UL transmission at the same time, so UE100 can be scheduled to perform DL reception associated with a first resource and UL transmission associated with a second resource, where the first and second resources may overlap in the time domain.

[0032] In some embodiments, at least one instruction includes a first instruction for DL ​​reception, a second instruction for UL transmission, or a combination thereof. In some embodiments, UE100 can receive a first instruction for DL ​​reception and a second instruction for UL transmission, and the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain. Furthermore, at least one instruction may include a higher-layer configuration, a dynamically scheduled DCI, or a combination thereof. The higher-layer configuration may include a Wireless Resource Control (RRC) configuration. In some embodiments, the first instruction for DL ​​reception is a higher-layer configuration or a dynamically scheduled DCI. In some embodiments, the second instruction for UL transmission is a higher-layer configuration or a dynamically scheduled DCI.

[0033] In S620, UE100 can perform DL reception via a first resource or UL transmission via a second resource, according to a rule. In some embodiments, the first and second resources are frequency-division multiplexed (FDM) in a frequency range, and the first and second resources may correspond to one or more identical slots or one or more identical symbols, but the first and second resources may correspond to different frequency ranges. The frequency ranges of the first and second resources may be BWP, serving cell, or resource block (RB) ranges. Since BS200 can operate in subband full duplex and perform DL and UL transmissions at the same time, UE100 can receive instructions indicating that DL reception and UL transmission are competing with each other in the time domain. In some embodiments, in response to receiving instructions indicating DL reception and UL transmission that are competing with each other in the time domain, UE100 can perform either DL reception or UL transmission, according to a rule. This rule defines the priority of different types of DL reception and UL transmission. Whenever a collision occurs in the time domain between DL reception and UL transmission, UE100 can handle the collision according to the rules.

[0034] In some embodiments, the first resource is a DL resource and the second resource is a flexible resource. In some embodiments, the first resource is a flexible resource and the second resource is a UL resource. In some embodiments, the first resource is a flexible resource and the second resource is another flexible resource. In some embodiments, the first resource is a DL resource and the second resource is a UL resource.

[0035] Figures 7A and 7B are schematic diagrams illustrating UL delay reduction according to exemplary embodiments of the present invention. In the embodiments of Figures 7A and 7B, the first resource may be a DL resource, and the second resource may be a flexible resource. Referring to Figure 7A, UE100 can receive DCI and PDSCH indicated by DCI on DL resource 701. Subsequently, UE100 can perform HARQ transmission by PUCCH on flexible resource 702. Since flexible resource 702 is configured based on the full duplex operation of BS200, HARQ feedback delay can be reduced. Referring to Figure 7B, UE100 can receive DCI scheduling UL transmission. Subsequently, UE100 can transmit UL data by PUSCH on flexible resource 704, and perform PUSCH repeat on flexible resource 705. That is, since flexible resources 704 and 705 are configured based on the full duplex operation of BS200, PUSCH repeat can be provided to enhance UL coverage.

[0036] In some embodiments, if DL reception is not configured on the first resource, UE100 can perform UL transmission via the second resource without performing DL reception via the first resource. Specifically, in some embodiments, if DL reception on the first resource is not configured by a higher-layer setting or DCI, UE100 may, in response to receiving a corresponding instruction, transmit PUSCH, PUCCH, PRACH, or SRS on the second resource, such as DCI format, RARUL grant, fallback RARUL grant, or success RAR. Alternatively, in some embodiments, if DL reception on the first resource is not configured by a higher-layer setting or DCI, UE100 may transmit a UL signal configured by a higher-layer setting.

[0037] Figure 8A is a schematic diagram illustrating the execution of DL reception or UL transmission without DL configuration according to an exemplary embodiment of the present invention. Referring to Figure 8A, in response to DL reception not being scheduled in the first resource 801 by any upper-layer configuration or any DCI, UE 100 can perform UL transmission indicated by the DCI in the second resource 802. That is, if UE 100 does not perform DL reception in the first resource 801, UE 100 can perform dynamically scheduled UL transmission in the second resource 802. In Figure 8A, the first resource 801 is a DL resource and the second resource 802 is a flexible resource. However, in other embodiments, the second resource 802 carrying the dynamically scheduled UL transmission may be a UL resource. In other embodiments, the first resource 801, which is not configured for DL ​​reception, may be a flexible resource.

[0038] Figure 8B is a schematic diagram illustrating the execution of DL reception or UL transmission without DL configuration according to an exemplary embodiment of the present invention. Referring to Figure 8B, in response to DL reception not being scheduled in the first resource 803 by any upper-layer configuration or any DCI, UE 100 can perform UL transmission instructed by the upper-layer configuration in the second resource 804. That is, if UE 100 does not perform DL reception in the first resource 803, UE 100 can perform UL transmission of the upper-layer configuration in the second resource 804. In Figure 8B, the first resource 803 is a DL resource and the second resource 804 is a flexible resource. However, in other embodiments, the second resource 804 carrying upper-layer configured UL transmission may be a UL resource. In other embodiments, the first resource 803, which is not configured for DL ​​reception, may be a flexible resource.

[0039] In some embodiments, UE100 can receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 may perform DL reception via the first resource without performing UL transmission via the second resource if DL reception is SSB reception. Specifically, even if UL transmission on the second resource is instructed by a higher-layer setting or DCI, DL reception is selected to be performed if DL reception on the first resource is SSB reception.

[0040] Figure 9A is a schematic diagram showing that, according to one embodiment of the present invention, DL reception or UL transmission is performed when DL reception is SSB reception. Referring to Figure 9A, UE 100 receives a first instruction instructing scheduled SSB reception on the first resource 901, and in response that at least one symbol of the SSB and the UL transmission overlap in the time domain, UE 100 performs SSB reception on the first resource 901 but does not perform UL transmission on the second resource 902 instructed by DCI (e.g., unexpectedly). In other words, if at least one symbol of the SSB and the UL transmission overlap in the time domain, SSB reception is performed on the first resource 901, but dynamic scheduled UL transmission is not performed on the second resource 902. In Figure 9A, the first resource 901 is a DL resource and the second resource 902 is a flexible resource. However, in other embodiments, the first resource 901 carrying the SSB may be a flexible resource. In other embodiments, the second resource 902 that carries the dynamic scheduled UL transmission may be a UL resource.

[0041] Figure 9B is a schematic diagram illustrating that, according to one embodiment of the present invention, DL reception or UL transmission is performed when DL reception is SSB reception. Referring to Figure 9B, UE 100 receives a first instruction instructing scheduled SSB reception on the first resource 903, and in response to the time domain overlap of at least one symbol of the SSB and UL transmission, UE 100 may receive the SSB on the first resource 903 but not perform (e.g., not expect) UL transmission on the second resource 904 as instructed by the higher layer setting. In other words, if the time domain overlap of at least one symbol of the SSB and UL transmission, SSB reception is performed on the first resource 901, but the higher layer scheduled UL transmission on the second resource 902 is not performed. In Figure 9B, the first resource 903 is a DL resource, and the second resource 904 is a flexible resource. However, in other embodiments, the first resource 903 carrying the SSB may be a flexible resource. In other embodiments, the second resource 904 that carries the scheduled UL transmissions of the upper layer may be an UL resource.

[0042] In some embodiments, UE100 can receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 can perform UL transmission via the second resource without performing DL reception via the first resource if the DL reception is a CORESET reception associated with a first group of search spaces (SS) and the second instruction is a dynamically scheduled DCI. The first group of SS consists of a type 1 common search space (CSS), a type 3 CSS, or a UE-specific SS, each with its own RRC configuration. CORESET reception associated with a first group of search spaces in the first resource can be indicated by a higher-layer configuration. Specifically, CORESET reception and UL transmission can overlap in the time domain and be selected to perform UL transmission.

[0043] Figure 10A is a schematic diagram illustrating that when DL reception is CORESET reception according to one embodiment of the present invention, DL reception or UL transmission is performed. Referring to Figure 10A, CORESET reception associated with a first group of SS in the first resource 1001 is indicated by a first instruction, which is a higher-layer setting. UE 100 receives a second instruction indicating UL transmission in the second resource 1002, and in response that at least one symbol of CORESET reception and UL transmission overlaps in the time domain, UE 100 may perform UL transmission in the second resource but not receive (e.g., not expect to receive) CORESET associated with the first group in the search space. In other words, if CORESET reception and UL transmission overlap in the time domain, CORESET reception in the first resource 1001 is not performed, and a dynamically scheduled UL transmission in the second resource 1002 is performed. In Figure 10A, the first resource 1001 is a DL resource, and the second resource 1002 is a flexible resource. However, in other embodiments, the first resource 1001 that carries the CORESET may be a flexible resource. In other embodiments, the second resource 1002 that carries the dynamically scheduled UL transmission may be a UL resource.

[0044] In some embodiments, UE100 can receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 may perform DL reception via the first resource without performing UL transmission via the second resource if DL reception is a CORESET reception associated with a second group of search space and the second instruction is a dynamically scheduled DCI. The second group SS includes type 1 CSS, type 0 CSS, type 0A CSS, or type 2 CSS without a dedicated RRC configuration. CORESET reception associated with a second group of search space in the first resource can be instructed by a higher-layer configuration.

[0045] Figure 10B is a schematic diagram illustrating that when DL reception is CORESET reception according to one embodiment of the present invention, DL reception or UL transmission is performed. Referring to Figure 10B, CORESET reception associated with a second group of SS in the first resource 1003 is indicated by a first instruction, which is a higher-layer setting. UE 100 receives a second instruction indicating UL transmission in the second resource 1004, and in response that at least one symbol of CORESET reception and UL transmission overlaps in the time domain, UE 100 may perform CORESET reception associated with the second instruction of SS in the first resource 1003, but not perform (e.g., not expect) UL transmission in the second resource 1004. In other words, if CORESET reception and UL transmission overlap in the time domain, CORESET reception is performed in the first resource 1003, but the dynamically scheduled UL transmission in the second resource 1004 is not performed. In Figure 10B, the first resource 1003 is a DL resource, and the second resource 1004 is a flexible resource. However, in other embodiments, the first resource 1003 that carries the CORESET may be a flexible resource. In other embodiments, the second resource 1004 that carries the dynamically scheduled UL transmission may be a UL resource.

[0046] In some embodiments, UE100 can receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. If the first instruction is a higher-layer setting and the second instruction is a dynamic scheduled DCI, UE100 may perform UL transmission via the second resource without performing DL reception via the first resource.

[0047] Figure 11 is a schematic diagram showing that DL reception or UL transmission is performed when DL reception is configured by a higher layer according to one embodiment of the present invention. Referring to Figure 11, DL reception at the first resource 1101 is indicated by a first instruction, which is a higher layer setting, and UL transmission at the second resource 1102 is indicated by a second instruction, which is a dynamic scheduled DCI. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, UE 100 may perform UL transmission at the second resource 1102 and not perform (e.g., not expect) DL reception at the first resource 1101. In other words, if DL reception and UL transmission overlap in the time domain, the higher layer scheduled DL reception at the first resource 1101 is not performed, and the dynamic scheduled UL transmission at the second resource 1102 is performed. In Figure 11, the first resource 1101 is a DL resource, and the second resource 1102 is a flexible resource. However, in other embodiments, the first resource 1101 that carries upper-layer scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1102 that carries dynamic scheduled UL transmission may be a UL resource.

[0048] In some embodiments, UE100 can receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 may perform DL reception via the first resource without performing UL transmission via the second resource if the first instruction is a dynamic scheduling DCI and the second instruction is a higher-layer setting.

[0049] Figure 12 is a schematic diagram showing that when DL reception is dynamic DL reception according to one embodiment of the present invention, DL reception or UL transmission is performed. Referring to Figure 12, DL reception in the first resource 1201 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 1202 is indicated by a second instruction, which is a higher-layer setting. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, UE 100 may perform DL reception in the first resource 1201 and not perform (e.g., not expect) UL transmission in the second resource 1202. In other words, if DL reception and UL transmission overlap in the time domain, the higher-layer scheduled UL transmission in the second resource 1202 is not performed, and the dynamically scheduled DL reception in the first resource 1201 is performed. In Figure 12, the first resource 1201 is a DL resource, and the second resource 1202 is a flexible resource. However, in other embodiments, the first resource 1201 that carries the dynamically scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1202 that carries the upper-layer scheduled UL transmission may be a UL resource.

[0050] In some embodiments, UE100 can receive a first instruction that directs DL reception on a first resource and a second instruction that directs UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. If the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, UE100 can perform either DL reception or UL transmission by comparing the priority parameter indicated by the first instruction with the other priority parameter indicated by the second instruction. If at least one symbol of the DL signal and the UL signal overlap in the time domain, UE100 may, in response to the first priority being higher than the second priority, receive DL reception at the first priority and not transmit (e.g., not expect) UL transmission at the second priority. Alternatively, if at least one symbol of the DL signal and the UL signal overlaps in the time domain, the UE100 may, in response to the second priority being higher than the first priority, transmit the UL transmission at the second priority and not receive (e.g., not expect) the DL reception at the first priority.

[0051] In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, the UE100 may perform DL reception via the first resource without performing UL transmission via the second resource if the first priority indicated by the first instruction is higher than the second priority indicated by the second instruction.

[0052] Figure 13 is a schematic diagram illustrating the execution of DL reception or UL transmission when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. Referring to Figure 13, DL reception in the first resource 1301 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 1302 is indicated by a second instruction, which is a dynamically scheduled DCI. If at least one symbol of DL reception and UL transmission overlaps in the time domain, UE 100 may, in response to determining that the first priority "1" indicated by the first instruction is higher than the second priority "0" indicated by the second instruction, perform DL reception in the first resource 1301 and not perform (e.g., do not expect) UL transmission in the second resource. In Figure 13, the first resource 1301 is a DL resource, and the second resource 1302 is a flexible resource. However, in other embodiments, the first resource 1301 carrying the dynamically scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1302 that carries the dynamic scheduled UL transmission may be a UL resource.

[0053] In some embodiments, UE100 can receive a first instruction that instructs DL reception on a first resource and a second instruction that instructs UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. If the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, UE100 can perform either DL reception or UL transmission by comparing the priority parameter indicated by the first instruction with the other priority parameter indicated by the second instruction. If the first priority indicated by the first instruction is the same as the second priority indicated by the second instruction, UE100 can perform either DL reception or UL transmission by comparing the timing of reception of the first instruction with the timing of reception of the second instruction. If at least one symbol of a DL reception and an UL transmission overlap in the time domain, and the first priority of the DL reception and the second priority of the UL reception are the same, UE100 may, in response to determining that the reception timing of the first instruction, which is a DCI, is later than that of the second instruction, which is another DCI, receive the DL reception but not transmit (e.g., do not expect) the UL transmission. Alternatively, if at least one symbol of a DL reception and an UL transmission overlap in the time domain, and the first priority of the DL reception and the second priority of the UL reception are the same, UE100 may, in response to determining that the reception timing of the second instruction, which is a DCI, is later than that of the first instruction, which is another DCI, perform the UL transmission but not perform (e.g., do not expect) the DL reception.

[0054] In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, the UE100 may perform DL reception via the first resource without performing UL transmission via the second resource if the reception time of the first instruction is later than the reception time of the second instruction.

[0055] Figure 14 is a schematic diagram illustrating the execution of DL reception or UL transmission when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. Referring to Figure 14, DL reception in the first resource 1401 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 1402 is indicated by a second instruction, which is a dynamically scheduled DCI. If at least one symbol of DL reception and UL transmission overlaps in the time domain, UE 100 may, in response to determining that the reception timing of the second instruction having a second priority "1" is later than the reception timing of the first instruction having a first priority "1", execute UL transmission in the second resource 1402 but not execute (e.g., do not expect) DL reception in the first resource 1401. In Figure 14, the first resource 1401 is a DL resource, and the second resource 1402 is a flexible resource. However, in other embodiments, the first resource 1401 that carries the dynamic scheduled DL reception may be a flexible resource. In other embodiments, the second resource 1402 that carries the dynamic scheduled UL transmission may be a UL resource.

[0056] Figure 15 is a schematic diagram of high-speed DL reception according to an exemplary embodiment of the present invention. Referring to Figure 15, the first resource may be a UL resource, and the second resource may be a flexible resource. UE100 can receive DCI and the PDSCH indicated by DCI in DL resource 1501. Subsequently, PDSCH repeats can be performed in flexible resource 1502. Since flexible resource 1502 is configured based on the full duplex operation of BS200, the delay of PDSCH repeats can be reduced, and DL coverage is improved.

[0057] In some embodiments, if UL transmission is not configured in the second resource, UE100 may perform DL reception via the first resource without performing UL transmission via the second resource. Specifically, in some embodiments, if UL transmission in the second resource is not configured by any higher-layer configuration or any DCI, UE100 may receive DL reception in the first resource in response to receiving a corresponding instruction such as a DCI format. Alternatively, in some embodiments, if UL transmission in the second resource is not configured by any higher-layer configuration or any DC, UE100 may receive DL reception configured by a higher-layer configuration.

[0058] Figure 16A is a schematic diagram illustrating the execution of DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 16A, in response to no UL transmission being scheduled in the second resource 1602 by any upper-layer configuration or any DCI, UE 100 may perform DL reception indicated by the DCI in the second resource 1601. That is, if UE 100 does not perform any UL transmission in the first resource 1601, UE 100 may perform dynamically scheduled DL reception in the second resource 1602. In Figure 16A, the first resource 1601 is a flexible resource and the second resource 1602 is a UL resource. However, in other embodiments, the first resource 1601 carrying dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1602, which does not have UL transmission configured, may be a flexible resource.

[0059] Figure 16B is a schematic diagram illustrating the execution of DL reception or UL transmission without UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 16B, in response to the fact that no UL transmission is scheduled in the second resource 1604 by any upper-layer configuration or any DCI, UE 100 may perform DL reception indicated by the upper-layer configuration in the second resource 1603. That is, if UE 100 does not perform any UL reception in the second resource 1604, UE 100 may perform DL reception of the upper-layer configuration in the first resource 1603. In Figure 16B, the first resource 1603 is a flexible resource and the second resource 1604 is a UL resource. However, in other embodiments, the first resource 1603 that carries upper-layer scheduled DL reception may be a DL resource. In other embodiments, the second resource 1604 in which no UL transmission is configured may be a flexible resource.

[0060] In some embodiments, UE100 may receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 may perform UL transmission via the second resource without performing DL reception via the first resource if the UL transmission is a Scheduling Request (SR). Specifically, regardless of whether DL transmission in the first resource is indicated by a higher-layer configuration or DCI, UL transmission is selected to be performed if UL transmission in the second resource is a Scheduling Request.

[0061] Figure 17A is a schematic diagram illustrating that, according to an exemplary embodiment of the present invention, DL reception or UL transmission is performed when UL transmission is SR. Referring to Figure 17A, UE 100 receives a second instruction indicating a scheduled SR in the second resource 1702, and in response to at least one symbol of the SR and DL reception overlapping in the time domain, the UE 100 may perform an SR transmission in the second resource 1702 but not (e.g., not expect) a DL reception in the first resource 1701 indicated by DCI. In other words, if at least one symbol of the SR and DL reception overlaps in the time domain, an SR transmission is performed in the second resource 1702, but a dynamically scheduled DL reception is not performed in the first resource 1701. In Figure 17A, the first resource 1701 is a flexible resource, and the second resource 1702 is a UL resource. However, in other embodiments, the first resource 1701 carrying a dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1702 that transports the SR may be a flexible resource.

[0062] Figure 17B is a schematic diagram illustrating that, according to an exemplary embodiment of the present invention, when a UL transmission is an SR, a DL reception or UL transmission is performed. Referring to Figure 17B, UE 100 receives a second instruction indicating a scheduled SR on a second resource 1704, and in response to at least one symbol of the SR and DL reception overlapping in the time domain, the second resource 1704 may perform an SR transmission, but the first resource 1703, as indicated by the higher-layer setting, may not perform (e.g., not expect) a DL reception. In other words, if at least one symbol of the SR and DL reception overlaps in the time domain, the second resource 1704 performs an SR transmission, but the higher-layer scheduled DL reception on the first resource 1703 is not performed. In Figure 17B, the first resource 1701 is a flexible resource, and the second resource 1702 is a UL resource. However, in other embodiments, the first resource 1701 carrying a dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 1702 that transports the SR may be a flexible resource.

[0063] In some embodiments, UE100 may receive a first instruction to perform DL reception on a first resource and a second instruction to perform UL transmission on a second resource, where DL reception and UL transmission compete with each other in the time domain. UE100 may perform UL transmission via the second resource without performing DL reception via the first resource if the UL transmission is message 1 (Msg1) or message 3 (Msg3) of a Random Access (RA) procedure. Specifically, regardless of whether DL transmission in the first resource is indicated by a higher-layer configuration or DCI, UL transmission is selected to be performed when UL transmission in the second resource is Msg1 or Msg3 of an RA procedure.

[0064] Figure 18A is a schematic diagram illustrating the execution of DL reception or UL transmission when the UL transmission according to an exemplary embodiment of the present invention is an RA message. Referring to Figure 18A, UE100 receives a second instruction indicating Msg1 or Msg3 of an RA procedure scheduled to the second resource 1802, and if the RA message and at least one symbol of DL reception overlap in the time domain, the second resource 1802 may transmit Msg1 or Msg3 of the RA procedure, but the first resource 1801, indicated by DCI, may not perform (e.g., not expect) DL reception. In other words, if Msg1 or Msg3 of the RA procedure is transmitted in the second resource 1802, but the RA message and at least one symbol of DL reception overlap in the time domain, dynamic scheduled DL reception is not performed in the first resource 1801. In Figure 18A, the first resource 1801 is a flexible resource, and the second resource 1802 is a UL resource. However, in other embodiments, the first resource 1801 that carries the dynamic scheduled DL reception may be a DL resource. In other embodiments, the second resource 1802 that carries the RA message may be a flexible resource.

[0065] Figure 18B is a schematic diagram illustrating the execution of DL reception or UL transmission when the UL transmission according to an exemplary embodiment of the present invention is an RA message. Referring to Figure 18B, UE100 receives a second instruction indicating Msg1 or Msg3 of an RA procedure scheduled for the second resource 1804, and if the RA message and at least one symbol of DL reception overlap in the time domain, the second resource 1804 transmits Msg1 or Msg3 of the RA procedure, but the first resource 1803, as indicated by the higher-layer setting, may not perform (e.g., not expect) DL reception. In other words, if the RA message and at least one symbol of DL reception overlap in the time domain, the second resource 1804 transmits Msg1 or Msg3 of the RA procedure, but the higher-layer scheduled DL reception signal of the first resource 1803 is not performed. In Figure 18B, the first resource 1803 is a flexible resource, and the second resource 1804 is a UL resource. However, in other embodiments, the first resource 1803 that carries the dynamic scheduled DL reception may be a DL resource. In other embodiments, the second resource 1804 that carries the RA message may be a flexible resource.

[0066] Figure 19 is a schematic diagram showing that when UL transmission according to one embodiment of the present invention is configured by a higher layer, DL reception or UL transmission is performed. Referring to Figure 19, DL reception in the first resource 1901 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 1902 is indicated by a second instruction, which is a higher layer configuration. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, UE 100 may perform DL reception in the first resource 1901 and not perform (e.g., not expect) UL transmission in the second resource 1902. In other words, if DL reception and UL transmission overlap in the time domain, the higher layer scheduled UL transmission in the second resource 1902 is not performed, and the dynamically scheduled DL reception in the first resource 1901 is performed. In Figure 19, the first resource 1901 is a flexible resource, and the second resource 1902 is a UL resource. However, in other embodiments, the first resource 1901 that carries dynamic scheduled DL reception may be a DL resource. In other embodiments, the second resource 1902 that carries upper-layer scheduled UL transmission may be a flexible resource.

[0067] Figure 20 is a schematic diagram illustrating the execution of DL reception or UL transmission when UL transmission is dynamic UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 20, DL reception in the first resource 2001 is indicated by a first instruction, which is a higher-layer setting, and UL transmission in the second resource 2002 is indicated by a second instruction, which is a dynamically scheduled DCI. In response to at least one symbol of DL reception and UL transmission overlapping in the time domain, UE 100 may perform UL transmission in the second resource 2002 but not perform (e.g., not expect) DL reception in the first resource 2001. In other words, if DL reception and UL transmission overlap in the time domain, the higher-layer scheduled DL reception in the first resource 2001 is not performed, and the dynamically scheduled UL transmission in the second resource 2002 is performed. In Figure 20, the first resource 2001 is a flexible resource, and the second resource 2002 is a UL resource. However, in other embodiments, the first resource 2001 that carries upper-layer scheduled DL reception may be a DL resource. In other embodiments, the second resource 2002 that carries dynamic scheduled UL transmission may be a flexible resource.

[0068] In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, the UE 100 can perform either DL reception or UL transmission by comparing the priority parameter indicated by the first instruction with the other priority parameter indicated by the second instruction. In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, and the second priority indicated by the second instruction is higher than the first priority indicated by the first instruction, the UE 100 can perform UL transmission via the second resource without performing DL reception via the first resource.

[0069] Figure 21A is a schematic diagram illustrating the execution of DL reception or UL transmission when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. Referring to Figure 21A, DL reception in the first resource 2101 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 2102 is indicated by a second instruction, which is a dynamically scheduled DCI. If at least one symbol of DL reception and UL transmission overlaps in the time domain, UE 100 may, in response to determining that the second priority "1" indicated by the second instruction is higher than the first priority "0" indicated by the first instruction, execute UL transmission in the second resource 2102 and not execute (e.g., do not expect) DL reception in the first resource 2101. In Figure 21A, the first resource 2101 is a flexible resource, and the second resource 2102 is a UL resource. However, in other embodiments, the first resource 2101 that carries the dynamic scheduled DL reception may be a DL resource. In other embodiments, the second resource 2102 that carries the dynamic scheduled UL transmission may be a flexible resource.

[0070] In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, and the first priority indicated by the first instruction is the same as the second priority indicated by the second instruction, then UE100 can perform either DL reception or UL transmission by comparing the reception timing of the first instruction with the reception timing of the second instruction. In some embodiments, if the first instruction is a dynamically scheduled DCI and the second instruction is another dynamically scheduled DCI, and at least one symbol of the DL signal and the UL signal overlaps in the time domain, then if the reception time of the second instruction is later than the reception time of the first instruction, UE100 can perform UL transmission via the second resource without performing DL reception via the first resource.

[0071] Figure 21B is a schematic diagram illustrating the execution of DL reception or UL transmission when DL reception is dynamic DL reception and UL transmission is dynamic UL transmission according to one embodiment of the present invention. Referring to Figure 21B, DL reception in the first resource 2103 is indicated by a first instruction, which is a dynamically scheduled DCI, and UL transmission in the second resource 2104 is indicated by a second instruction, which is a dynamically scheduled DCI. If at least one symbol of DL reception and UL transmission overlaps in the time domain, in response to determining that the reception timing of the first instruction having a first priority "1" is later than the reception timing of the second instruction having a first priority "1", UE 100 may perform DL reception in the first resource 2103 but not perform (e.g., not expect) UL transmission in the second resource 2104. In Figure 21B, the first resource 2103 is a flexible resource, and the second resource 2104 is a UL resource. However, in other embodiments, the first resource 2103 that carries the dynamically scheduled DL reception may be a DL resource. In other embodiments, the second resource 2104 that carries the dynamically scheduled UL transmission may be a flexible resource.

[0072] In some embodiments, the UE100 can perform BWP switching for UL transmission to reduce the delay of UL transmission (e.g., HARQ feedback). Embodiments related to BWP switching for UL transmission are described in the following paragraphs.

[0073] In some embodiments, UE100 can receive at least one instruction indicating at least one of DL reception and UL transmission. The at least one instruction includes a first instruction indicating DL reception and a second instruction indicating UL transmission. That is, UE100 may receive a first instruction indicating DL reception at a first resource and a second instruction indicating UL transmission at a second resource. Note that in some embodiments, the second instruction is a field of the first instruction. The first resource is a first BWP, and the second resource is a second BWP.

[0074] In some embodiments, UE100 can perform DL reception via a first BWP indicated by a first instruction, and then perform UL transmission via a second BWP indicated by a second instruction. The UL transmission is a HARQ transmission. That is, the UL transmission in the second BWP may include a HARQ-ACK or a HARQ-NACK. UE100 can perform PDSCH reception in the first BWP indicated by a first instruction, which is a DL DCI format, and such a DL DCI format may include a field for notifying a second BWP from which UE100 can send HARQ feedback for PDSCH reception. For example, the field in such a DL DCI format may be a BWP indicator for HARQ feedback, and the BWP indicator may be a BWP ID.

[0075] In some embodiments, after a UL transmission (e.g., HARQ transmission), the UE100 can perform a BWP switch from the second BWP to the first BWP. In some embodiments, after a UL transmission, the UE100 can perform a BWP switch from the second BWP to a third BWP indicated by a first instruction. That is, after the UL transmission indicated by the second instruction at the second BWP is completed, the UE100 can automatically perform a BWP switch from the second BWP back to the first BWP without any instruction. Alternatively, after the UL transmission indicated by the second instruction at the second BWP is completed, the UE100 may perform a BWP switch from the second BWP back to the first BWP indicated by the first instruction.

[0076] Figure 22 is a schematic diagram showing explicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to Figure 22, UE100 can receive PDSCH222, indicated by DCI221, at slot #n via BWP#0. A field of DCI221 (i.e., the first indicator) (i.e., the second indicator) may include a BWP indicator indicating BWP#1 for HARQ feedback transmission. Thus, UE100 may perform BWP switching from BWP#0 to BWP#1 and use BWP#1 to perform HARQ feedback transmission corresponding to PDSCH222. HARQ feedback 223 can be transmitted at slot #(n+1) using BWP#1. After HARQ feedback 223 has been transmitted, UE100 may again perform BWP switching from BWP#1 to BWP#0, indicated by another field of DCI221. DCI221 includes a field indicating the target BWP for HARQ transmission, and DCI221 also includes other fields indicating other target BWPs to be activated after HARQ transmission.

[0077] In some embodiments, the UE100 is notified of a time position for performing a HARQ transmission, and therefore the target BWP for the HARQ transmission may be indicated by such a time position. In some embodiments, if the time position for a UL transmission in the first BWP is a UL resource, and the time position for the UL transmission is indicated by a second instruction, the second BWP is identical to the first BWP. In other words, the UE100 does not need to perform BWP switching for the HARQ transmission if the time position for the UL transmission indicated by the second instruction corresponds to a UL resource in the currently activated BWP.

[0078] In some embodiments, if the time position of UL transmission in the first BWP is a DL resource and the time position of UL transmission in the second BWP is a UL resource, the second BWP differs from the first BWP in that the time position of UL transmission is indicated by the second instruction. That is, UE100 can perform BWP switching for HARQ transmission if the time position of UL transmission indicated by the second instruction corresponds to the DL resource of the currently activated BWP. Furthermore, UE100 may perform BWP switching to the second BWP in which the UL resource corresponds to the time position of UL transmission. In some embodiments, the second BWP has the lowest BWP ID among multiple candidate BWPs. That is, if there are multiple candidate BWPs that have a UL resource at the time position indicated by the second instruction, UE100 may select the second BWP with the lowest BWP ID among the multiple candidate BWPs.

[0079] In some embodiments, UE100 can perform a PDSCH reception at slot #n of a first BWP, indicated by the DL DCI format, which may include a PDSCH-to-HARQ_feedback timing indicator field. The PDSCH-to-HARQ_feedback timing indicator field may indicate a value of k, where k is the time position of the UL transmission, which is the HARQ feedback transmission, and k is an integer greater than 0. If slot #(n+k) of the first BWP contains a UL resource, UE100 can transmit a HARQ corresponding to the PDSCH reception at slot #(n+k) of the first BWP. Alternatively, if a candidate BWP contains a UL resource at slot #(n+k), UE100 may transmit a HARQ feedback corresponding to the PDSCH reception at slot #(n+k) of the candidate BWP. If multiple candidate BWPs contain UL resources at slot #(n+k), UE100 can transmit a HARQ at the selected candidate BWP according to the BWP index. For example, the selected candidate BWP may have the lowest BWP index (i.e., the lowest BWP ID).

[0080] Figure 23A is a schematic diagram illustrating implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to Figure 23A, UE100 can receive PDSCH232 indicated by DCI231 in slot #n via BWP#0. A field (i.e., the second instruction) of DCI 231 (i.e., the first instruction) may contain the time position of the HARQ feedback. The time position of the HARQ feedback may be a value of k. In Figure 23A, k=1 is indicated in DCI231. That is, the PDSCH-to-HARQ_feedback_timing indicator field of DCI 231 may show a value of 1. Thus, in slot #n, after receiving PDSCH 232 indicated by DCI 231, UE100 can perform BWP switching to BWP#1 because slot #(n+1) of BWP#1 contains a UL resource. Therefore, UE100 can use BWP#1 to send HARQ feedback (i.e., PUCCH233) in slot #(n+1).

[0081] Figure 23B is a schematic diagram illustrating implicit BWP switching for HARQ by DCI according to an exemplary embodiment of the present invention. Referring to Figure 23B, UE100 can receive PDSCH232 indicated by DCI231 in slot #n via BWP#0. A field (i.e., the second instruction) of DCI231 (i.e., the first instruction) may contain the time position of the HARQ feedback. The time position of the HARQ feedback may be a value of k. In Figure 23B, k=1 is indicated by DCI231. Furthermore, in slot #(n+1), both BWP#1 and BWP#2 have UL resources, and UE100 may select BWP#1, which has a lower BWPID to send the HARQ feedback. Thus, after receiving PDSCH232 indicated by DCI231 in slot #n, UE100 may perform BWP switching to BWP#1. Therefore, UE100 can use BWP#1 to send HARQ feedback (i.e., PUCCH233) in slot #(n+1).

[0082] Figure 24A is a schematic diagram illustrating BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 24A, UE100 can receive PDSCH242, indicated by DCI241 in slot #n, via BWP#0. UE100 performs BWP switching to BWP#0 after the UL transmission (i.e., PUCCH243) indicated by the second instruction of BWP#1 is completed. In other words, UE100 can perform BWP switching automatically from the second BWP back to the first BWP without any instruction after the UL transmission indicated by the second instruction of the second BWP is completed.

[0083] In some embodiments, after UL transmission, UE100 may perform BWP switching if the second BWP does not have DL resources within a certain period. This period may be indicated by an RRC configuration. That is, UE100 may indicate the parameters of PeriodAfterUL (for example, by an RRC configuration). UE100 may perform BWP switching from the second BWP to the first BWP after UL transmission if the second BWP does not have DL resources within the PeriodAfterUL time period, which starts from the end of UL transmission.

[0084] Figure 24B is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 24B, UE100 can receive DCI244 indicating UL transmission 245 in slot #(n+1). UE100 can perform BWP switching from BWP#0 to BWP#1 in order to execute UL transmission 245. After UL transmission 245 in slot #(n+1), UE100 can perform BWP switching from BWP#1 to BWP#0 because there are no DL resources available within the PeriodAfterUL T1 period (e.g., 2 slots) in BWP#1.

[0085] In some embodiments, after UL transmission, UE100 can perform BWP switching from the second BWP to the third BWP having the earliest DL resource. In some embodiments, after UL transmission, UE100 can perform BWP switching from the second BWP to the candidate BWP where the DL resource appears earliest. If there are multiple candidate BWPs, UE100 can select a candidate BWP according to its BWP ID, for example, its lower BWP ID.

[0086] Figure 24C is a schematic diagram showing BWP switching after UL transmission according to an exemplary embodiment of the present invention. Referring to Figure 24C, UE100 can receive DCI244 indicating UL transmission 245 in slot #(n+1). UE100 can perform BWP switching from BWP#0 to BWP#1 in order to execute UL transmission 245. After UL transmission 245 in slot #(n+1), UE100 can perform BWP switching from BWP#1 to BWP#2 because BWP#2 has DL resources in the earliest slot #(n+2) among BWP#0, BWP#1, and BWP#2.

[0087] Figure 25 is a block diagram showing a communication device 2500 according to an exemplary embodiment of the present invention. Referring to Figure 25, the communication device 2500 may also be a UE. The communication device 2500 may include, but is not limited to, a processor 2510. The processor 2510 (e.g., having processing circuits) may include an intelligent hardware device, such as a central processing unit (CPU), a microcontroller, an ASIC, etc. The processor 2510 can call and execute a computer program from memory and carry out the method in the embodiment of the present invention.

[0088] The program code stored in the communication device 2500, when executed by the processor 2510, employs all the technical solutions of all the embodiments described above, and therefore has at least all the advantageous effects brought about by all the technical solutions of all the embodiments described above, which will not be further described here.

[0089] Optionally, the communication device 2500 may further include a memory 2520, as shown in Figure 25. The memory 2520 may include a computer storage medium in the form of volatile and / or non-volatile memory. The memory 2520 may be removable, non-removable, or a combination thereof. Exemplary memories include solid-state memory, hard drives, optical disc drives, etc. The processor 2510 can call and execute a computer program from the memory 2520 to carry out the method in the embodiment of the present invention.

[0090] The memory 2520 may be a separate device independent of the processor 2510, or it may be integrated into the processor 2510.

[0091] Optionally, as shown in Figure 25, the communication device 2500 may further include a transceiver 2530, and the processor 2510 may control the transceiver 2530 to communicate with other devices. The transceiver 2530, having a transmitter (e.g., a transmit / transmit circuit) and a receiver (e.g., a receive / receive circuit), may be configured to transmit and / or receive time and / or frequency resource division information. In some implementations, the transceiver 2530 may be configured to transmit in different types of subframes and slots, including but not limited to available, unavailable, and flexibly available subframe and slot formats. The transceiver 2530 may be configured to receive data and control channels. The transceiver 2530 can perform low-noise amplification (LNA), impedance matching, analog-to-digital (ADC) conversion, digital-to-analog (DAC) conversion, frequency mixing, up / down frequency conversion, filtering, amplification, and / or similar operations.

[0092] Specifically, the transceiver 2530 can transmit information or data to another device, or receive information or data transmitted by another device.

[0093] Specifically, the transceiver 2530 may include a transmitter and a receiver. The transceiver 2530 may further include an antenna, and the number of antennas may be one or more.

[0094] Considering the above explanation, in order to achieve full duplex, the frequency range can be divided into multiple resources, as shown in the TDD configuration. Furthermore, collisions between UL transmission and DL reception occurring on the UE side can be resolved to improve UL coverage, reduce latency, and improve system capacity for NR duplex operation. In addition, BWP switching for UL transmission and post-UL transmission may be directed to reduce UL transmission latency. It should be noted that the present invention does not require all of the above advantages.

[0095] Any components, actions, or instructions used in the detailed description of the embodiments disclosed herein should not be construed as absolutely essential or indispensable to the invention unless expressly stated otherwise. Furthermore, as used herein, the indefinite articles “a” and “an” may each include multiple items. When referring to only one item, the term “one” or similar language is used. In addition, as used herein, the term “any” followed by a list of multiple items and / or multiple categories of items is intended to include “any combination,” “any combination,” “multiple combinations,” and / or “any combination of multiple items and / or categories of items, individually or in combination with other items and / or categories of other items.” Furthermore, as used herein, the term “set” is intended to include any number of items, including zero. Furthermore, as used herein, the term “number” is intended to include any number, including zero.

[0096] Those skilled in the art will see that various modifications and variations can be made to the structure of the present invention without departing from the scope or spirit of the invention. In consideration of the foregoing, the present invention is intended to encompass modifications and variations of the present invention insofar as they fall within the scope of the following claims and their equivalents. [Industrial applicability]

[0097] The duplex operation method and user equipment using it can be applied to future wireless communication systems. [Explanation of symbols]

[0098] 201: DL symbol 202: Flexible Symbols 203: UL symbol 301, 302: Flexible Resources 51,52: DCI 53: PDSCH 55: PUSCH 200: BS 100: UE S601, S602: Process 701, 703: DL Resources 702, 704, 705: Flexible Resources 801, 803, 901, 903, 1001, 1003, 1101, 1201, 1301, 1401, 1601, 1603, 1701, 1703, 1802, 1804, 1901, 2001, 2101, 2103: First Resource 802, 804, 902, 904, 1002, 1004, 1102, 1202, 1302, 1402, 1602, 1604, 1702, 1704, 1801, 1803, 1902, 2002, 2102, 2104: Second resource 1501: DL Resources 1502: Flexible Resources 221, 231, 241, 244: DCI 222, 232, 242: PDSCH 223: HARQ Feedback 233, 243: PUCCH 245: UL Transmission 2500: Communication device 2510: Processor 2520: Memory 2530: Transmitter / Receiver

Claims

1. A method of duplex operation used by user equipment (UE), Receiving a first instruction to perform DL reception and a second instruction to perform UL transmission, When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, either the DL reception via the first resource or the UL transmission via the second resource is performed. Includes, The first resource and the second resource are frequency-division multiplexed (FDM), The DL reception includes DL reception configured by the upper layer settings, and performing either the DL reception via the first resource or the UL transmission via the second resource is: A method comprising, when the UL transmission is a scheduling request (SR), performing the UL transmission via the second resource without expecting to perform a DL reception configured by the upper layer configuration via the first resource.

2. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein, when the DL reception is SSB reception, the DL reception is performed via the first resource without performing the UL transmission via the second resource.

3. The method according to claim 2, wherein the SSB reception has a higher priority than the UL transmission configured by the upper layer settings or the dynamically scheduled UL transmission.

4. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, further comprising the step of performing the UL transmission via the second resource without performing the DL reception via the first resource, where the DL reception is a CORESET reception associated with a first group of search space (SS) and the second instruction is a dynamically scheduled DCI.

5. The method according to claim 4, wherein the first group of SS includes a Type 1 Common Search Space (CSS) having a dedicated RRC configuration, a Type 3 CSS, or a UE-specific SS.

6. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein the DL reception is a CORESET reception associated with a second group of search space (SS), and the second instruction is a dynamically scheduled DCI, the method comprising performing the DL reception via the first resource without performing the UL transmission via the second resource.

7. The method according to claim 6, wherein the second group of SS includes type 1 CSS, type 0 CSS, type 0A CSS, or type 2 CSS without a dedicated RRC configuration.

8. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein the first instruction is a higher layer setting and the second instruction is a dynamically scheduled DCI, the method further includes the step of performing the UL transmission via the second resource without performing the DL reception via the first resource.

9. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein, if the first instruction is a dynamically scheduled DCI and the second instruction is a higher-layer setting, the DL reception is performed via the first resource without performing the UL transmission via the second resource.

10. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein if the first priority indicated by the first instruction is higher than the second priority indicated by the second instruction, the DL reception is performed via the first resource without performing the UL transmission via the second resource.

11. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. The first priority indicated by the first instruction is the same as the second priority indicated by the second instruction. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, further comprising performing the DL reception via the first resource without performing the UL transmission via the second resource if the reception time of the first instruction is later than the reception time of the second instruction.

12. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein, if the UL transmission is message 1 (Msg1) or message 3 (Msg3) of a random access (RA) procedure, the UL transmission is performed via the second resource without performing the DL reception via the first resource.

13. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, wherein if the second priority indicated by the second instruction is higher than the first priority indicated by the first instruction, the UL transmission is performed via the second resource without performing the DL reception via the first resource.

14. The first instruction is a dynamically scheduled DCI, and the second instruction is another dynamically scheduled DCI. The first priority indicated by the first instruction is the same as the second priority indicated by the second instruction. When the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, the step of performing either the DL reception via the first resource or the UL transmission via the second resource is: The method according to claim 1, further comprising, if the time of reception of the second instruction is later than the time of reception of the first instruction, performing the UL transmission via the second resource without performing the DL reception via the first resource.

15. The method according to claim 1, wherein the first instruction is a higher-level setting or a dynamically scheduled DCI.

16. The method according to claim 1, wherein the second instruction is a higher-level setting or a dynamically scheduled DCI.

17. The method according to claim 1, wherein the first resource is a DL resource and the second resource is a flexible resource.

18. The method according to claim 1, wherein the first resource is a flexible resource and the second resource is a UL resource.

19. The method according to claim 1, wherein the first resource is a flexible resource, and the second resource is another flexible resource.

20. The method according to claim 1, wherein the first resource is a DL resource and the second resource is an UL resource.

21. If the UL transmission is a scheduling request (SR), then executing the UL transmission via the second resource without executing the DL reception configured by the upper layer settings via the first resource is: The method according to claim 1, wherein the UE does not expect to perform both the scheduling request (SR) and the DL reception configured by the upper layer settings.

22. Transmitter and receiver, Connected to the aforementioned transceiver, at least Having received a first instruction to receive DL and a second instruction to transmit UL, If the DL reception instructed by the first instruction and the UL transmission instructed by the second instruction overlap in the time domain, either the DL reception via the first resource or the UL transmission via the second resource is executed. A processor configured as such, The first resource and the second resource are frequency-division multiplexed (FDM), The DL reception is configured to include DL reception configured by the upper layer settings, The aforementioned processor, A user device that, when the UL transmission is a scheduling request (SR), performs the UL transmission via the second resource without expecting to perform a DL reception configured by the upper layer settings via the first resource.

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